Valves are low-margin product, market competition is fierce. Valve market distribution is mainly based on project construction, petrochemical industry is the biggest user of valves, power sector, metallurgy, chemical industry and urban construction sectors. Petrochemical industry main application API standard of gate, and as valve and check back valve; power sector main used power station with high temperature pressure gate, and as valve, and check back valve and safety valve and the part to drainage valve of low voltage butterfly valve, and gate; chemical industry main used stainless steel gate, and as valve, and check back valve; metallurgical industry main used low voltage big caliber butterfly valve, and oxygen as valve and oxygen ball valve; city construction sector main used low voltage valve, as City tap water pipeline main used big caliber gate, floor Yu construction main used Middle butterfly valve, Urban heating using metal sealing butterfly valve pipeline using flat plate gate valves and ball valves pharmaceutical industry mainly uses stainless steel ball valve food industry mainly uses stainless steel ball valve and so on. Large amount of valves used in water treatment, mainly in the low pressure valve products, such as butterfly valves, gate valves, check valves. It is understood that currently on the market with a certain scale valve company has more than 2000 companies mostly in Jiangsu and Zhejiang provinces and the central area. Because of the technological content of products are relatively low and, therefore, more competitive.